获取辅助监视器的大小

Question

我似乎很难在Java中获得多个监视器的大小;

因此，我做了一个小窗口，应该显示一个屏幕的尺寸，它适用于我的主监视器，现在我想能够确定它的监视器的大小，我用getLocation()知道在哪里我的JFrame是，但我不知道如何获得该显示器的大小，我只能得到主显示器的大小，甚至是他们的总大小。

Answer 1

您需要进入GraphicsEnvironment，这将使您可以访问系统上可用的所有GraphicsDevice。

从那里

本质上讲，你需要通过每个GraphicsDevice和测试循环，看看窗外是一个给定的GraphicsDevice

有趣的部分的范围内，则如果窗口在多个屏幕上跨越做什么。 ..

public static GraphicsDevice getGraphicsDevice(Component comp) { 

    GraphicsDevice device = null; 
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); 
    GraphicsDevice lstGDs[] = ge.getScreenDevices(); 
    ArrayList<GraphicsDevice> lstDevices = new ArrayList<GraphicsDevice>(lstGDs.length); 

    if (comp != null && comp.isVisible()) { 
     Rectangle parentBounds = comp.getBounds(); 
     /* 
     * If the component is not a window, we need to find its location on the 
     * screen... 
     */ 
     if (!(comp instanceof Window)) { 
      Point p = new Point(0, 0); 
      SwingUtilities.convertPointToScreen(p, comp); 
      parentBounds.setLocation(p); 
     } 

     // Get all the devices which the window intersects (ie the window might expand across multiple screens) 
     for (GraphicsDevice gd : lstGDs) { 
      GraphicsConfiguration gc = gd.getDefaultConfiguration(); 
      Rectangle screenBounds = gc.getBounds(); 
      if (screenBounds.intersects(parentBounds)) { 
       lstDevices.add(gd); 
      } 
     } 

     // If there is only one device listed, return it... 
     // Otherwise, if there is more then one device, find the device 
     // which the window is "mostly" on 
     if (lstDevices.size() == 1) { 
      device = lstDevices.get(0); 
     } else if (lstDevices.size() > 1) { 
      GraphicsDevice gdMost = null; 
      float maxArea = 0; 
      for (GraphicsDevice gd : lstDevices) { 
       int width = 0; 
       int height = 0; 
       GraphicsConfiguration gc = gd.getDefaultConfiguration(); 
       Rectangle bounds = gc.getBounds(); 
       Rectangle2D intBounds = bounds.createIntersection(parentBounds); 
       float perArea = (float) ((intBounds.getWidth() * intBounds.getHeight())/(parentBounds.width * parentBounds.height)); 
       if (perArea > maxArea) { 
        maxArea = perArea; 
        gdMost = gd; 
       } 
      } 

      if (gdMost != null) { 
       device = gdMost; 
      } 
     } 
    } 

    return device; 
}